The strain of bird flu is distinct from what has previously been found in dairy cattle. The finding means the virus has again spilled over from birds to cows, and it raises some worrying questions.

The new version, known as D1.1, was confirmed in Nevada cattle and was linked to the first US death tied to bird flu ...

Dairy cattle in Nevada have been infected with a new type of bird flu that's different from the version that has spread in herds since last year.

Cases of bird flu have affected 50 flocks in Ohio over the past 30 days, representing a total number of 10 million birds on ...

A new strain of bird flu has been detected in US dairy cattle, raising concerns about its potential transmission and impact ...